A 2048X2048 PIXEL CCD X-RAY IMAGE SENSOR SYSTEM

本研究计画的目的是发展一个X光影像感测系统 基于2048 × 2048像素CCD型固态图像传感器， 在第一阶段成功地证明了具有2000像素的空间分辨率 与照相胶片和图像增强器相比， 基于X射线成像系统。 第二阶段的工作将集中在“相机”的一部分， 临床X射线系统;在这种情况下，聚焦X射线的光学器件 荧光屏图像到400万像素的图像传感器和CCD 数字电视摄像机 光学和CCD响应将是 优化到市售的发射光谱和分辨率 X射线荧光屏，相机将被设计为产生16位 适用于计算机处理y图像的每像素数字视频 增强软件和设备。 空间分辨率的提高， 线性度，动态范围和信噪比提供的大 基于CCD格式的相机将允许数字图像增强程序， 提取和显示扩展的对比度和更精细的空间细节 目前可以通过扫描X射线胶片或显像管电视 相机 还应该注意的是，没有固有的寿命 CCD的局限性。 数字X射线照相机的商业市场是 很好地建立了。

The aim of this research program is to develop an x-ray image sensor system based on a 2048x2048 pixel CCD type solid state image sensor that has been successfully demonstrated in Phase I to have 2000 pixel spatial resolution and wide dynamic range compared to photographic film and image intensifier based x-ray imaging systems. The Phase II effort will be concentrated on the "camera" portion of a clinical x-ray system; in this case the optics that focuses an x-ray phosphor screen image onto the 4 million pixel image sensor and the CCD digital television camera itself. The optics and CCD response will be optimized to the emission spectrum and resolution of commercially available x-ray phosphor screens, and the camera will be designed to produce 16 bit per pixel digital video suitable for computer processing y image enhancement software and equipment. The improvement in spatial resolution, linearity, dynamic range and signal-to-noise ratio afforded by the large format CCD based camera will allow digital image enhancement programs to extract and display expanded contrast and finer spatial detail than is currently possible from scanning x-ray film or image tube television cameras. It should also be noted that there is no inherent lifetime limitation in CCDs. The commercial market for digital x-ray cameras is well established.